An on-line safety valve testing device

Abstract

The utility model discloses a kind of safety valve on-line detection device, including pressure stabilizing mechanism and detection mechanism, pressure stabilizing mechanism includes oil gas pipe and regulating valve, regulating valve is communicated in oil gas pipe;Detection mechanism includes control valve, connecting piece, air extraction piece and pressure measuring piece, control valve, connecting piece are installed on oil gas pipe, and connecting piece is located between regulating valve and control valve, connecting piece has with the first port and the second port of oil gas pipe communication, air extraction piece is connected with the first port, pressure measuring piece is connected with the second port.Solve the problem that in the prior art, when PV valve maintenance is carried out in gas station, PV valve needs to be disassembled to carry out leak detection, positive and negative pressure detection and other working conditions whether normal, detection process is more inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of safety valve testing technology, specifically to an online safety valve testing device. Background Technology

[0002] PV valves are used in gas station vapor recovery systems to maintain a certain tank pressure and reduce gasoline vapor evaporation. Installed at the top of the fuel tank's vapor recovery line, the PV valve effectively prevents rainwater, impurities, and other foreign objects from entering the pipeline. The PV valve has an internal bidirectional opening mechanism. Normally closed, the valve automatically opens to release / draw air when the tank pressure / vacuum reaches the valve's preset pressure / vacuum, maintaining a relatively stable tank pressure.

[0003] Currently, when performing PV valve maintenance at gas stations, the PV valve needs to be disassembled for leak testing, positive and negative pressure testing, and other checks to ensure its normal working status. During maintenance, disassembling the PV valve involves working at heights, requiring various high-risk work permits and the implementation of relevant safety protection and measures. Furthermore, the work is prone to accidents such as falls from heights and being struck by objects, posing safety hazards. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide an online safety valve testing device to solve the problem that in the prior art, when performing PV valve maintenance at gas stations, it is necessary to disassemble the PV valve for leak testing, positive and negative pressure testing, and other tests to check whether its working status is normal, which is quite inconvenient.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This utility model provides an online safety valve testing device, comprising:

[0007] A pressure stabilizing mechanism, comprising an oil / gas pipe and a regulating valve, the regulating valve being connected to the oil / gas pipe; and,

[0008] The testing mechanism includes a control valve, a connector, an air extraction component, and a pressure measuring component. The control valve and the connector are both installed on the oil and gas pipe, and the connector is located between the regulating valve and the control valve. The connector has a first port and a second port that communicate with the oil and gas pipe. The air extraction component is connected to the first port, and the pressure measuring component is connected to the second port.

[0009] In some embodiments, the connector includes a seat, a first ball valve, and a second ball valve. The seat is mounted on an oil / gas pipe and has a cavity, a first port, and a second port. The cavity is connected to the oil / gas pipe, and both the first port and the second port are connected to the cavity. Both the first ball valve and the second ball valve are mounted on the seat, and the first ball valve and the second ball valve correspond to the first port and the second port, respectively. The first ball valve is connected to the air extraction device, and the second ball valve is connected to the pressure measuring device.

[0010] In some embodiments, the connector further includes a first quick-connect fitting and a second quick-connect fitting, the first quick-connect fitting and the second quick-connect fitting being connected to a first ball valve and a second ball valve, respectively; the air extraction component is connected to the first quick-connect fitting via a first detection tube, and the pressure measuring component is connected to the second quick-connect fitting via a second detection tube.

[0011] In some embodiments, the oil and gas pipe is provided with two first connecting flanges, the seat is provided with two second connecting flanges, one of the second connecting flanges on the seat is fixed to one of the first connecting flanges on the oil and gas pipe via a first fastener, the other of the second connecting flanges on the seat is fixed to the flange joint of the control valve via a second fastener, and the other of the first connecting flanges on the oil and gas pipe is fixed to the flange joint of the regulating valve via a third fastener.

[0012] In some embodiments, the first fastener, the second fastener, and the third fastener are all screws or bolts.

[0013] In some embodiments, a water-absorbing and drying element is provided inside the cavity.

[0014] In some embodiments, the regulating valve is a pressure valve, a vacuum valve, or a PV valve.

[0015] In some embodiments, the control valve is a manual valve.

[0016] In some embodiments, the air extraction component is a vacuum pump.

[0017] In some embodiments, the pressure measuring element is a pressure gauge.

[0018] Compared with existing technologies, the safety valve online testing device provided by this utility model has a control valve and a connector both installed on the oil and gas pipeline, with the connector located between the regulating valve and the control valve. The connector has a first port and a second port communicating with the oil and gas pipeline. The air extraction component is detachably connected to the first port, and the pressure measuring component is detachably connected to the second port. During testing, the control valve can be closed, and the air extraction component is opened to evacuate the oil and gas pipeline. When the pressure measuring component's value tends to stabilize, the first port is closed, and the pressure measuring component's value is observed to see if it decreases. If the value displayed by the pressure measuring component is stable, it indicates that the regulating valve is properly sealed and leak-free. At the same time, the first port can be opened, and air can be supplied and pressurized into the oil and gas pipeline through the air extraction component until the regulating valve opens. The positive pressure of the regulating valve is detected by the value of the pressure measuring component. Alternatively, the air extraction component can be used to evacuate the oil and gas pipeline until the regulating valve opens. The negative pressure of the regulating valve is detected by the value of the pressure measuring component. This device does not require disassembly of the regulating valve, making testing convenient and reducing the workload of operators when maintaining the regulating valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an online safety valve testing device provided in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the connector provided in an embodiment of this utility model;

[0021] Figure 3 This is a front view of an online safety valve testing device provided in an embodiment of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] To address the technical problem that PV valve maintenance at gas stations requires disassembling the valve for leak testing, positive and negative pressure checks, and other inconvenient testing procedures, this invention provides an online safety valve testing device that allows for leak testing and positive and negative pressure checks without disassembling the PV valve, making it convenient to operate.

[0024] It should be noted that the safety valve online detection device described in this utility model is used for, but not limited to, side leakage detection of PV valves. For ease of explanation, this utility model will only use the application of a safety valve online detection device to side leakage detection of PV valves as an example for illustration, and will not be described in detail here.

[0025] Please see Figures 1-3 , Figures 1-3An online safety valve detection device according to one embodiment of the present invention includes a pressure stabilizing mechanism 1 and a detection mechanism 2. The pressure stabilizing mechanism 1 includes an oil and gas pipe 11 and a regulating valve 12, the regulating valve 12 being connected to the oil and gas pipe 11. The detection mechanism 2 includes a control valve 21, a connector 22, an air extraction component 23, and a pressure measuring component 24. The control valve 21 and the connector 22 are both installed on the oil and gas pipe 11, and the connector 22 is located between the regulating valve 12 and the control valve 21. The connector 22 has a first port and a second port connected to the oil and gas pipe 11. The air extraction component 23 is connected to the first port, and the pressure measuring component 24 is connected to the second port.

[0026] In actual use, first close the control valve 21, then open the air extraction device 23 to evacuate the oil and gas pipe 11. When the value of the pressure measuring device 24 tends to stabilize, close the first port and observe whether the value of the pressure measuring device 24 decreases. If the value displayed by the pressure measuring device 24 is stable, it indicates that the regulating valve 12 is sealed and leak-free. When it is necessary to test the positive and negative pressure of the regulating valve, the first port can be opened, and air can be supplied and pressurized into the oil and gas pipe 11 through the air extraction device 23 until the regulating valve 12 opens. The positive pressure of the regulating valve 12 can be detected by the value of the pressure measuring device 24. Alternatively, the oil and gas pipe can be evacuated through the air extraction device 23 until the regulating valve 12 opens. The negative pressure of the regulating valve 12 can be detected by the value of the pressure measuring device 24.

[0027] It should be noted that the regulating valve 12 is a PV valve. Of course, in other embodiments, the regulating valve 12 may also be a pressure valve or a vacuum valve. Specifically, when the system pressure exceeds the set value, the PV valve will automatically open to allow some airflow to escape, thereby reducing the system pressure. When the system pressure drops below the set value, the PV valve will close to prevent airflow from escaping and allow the pressure to rise back to the set range.

[0028] In one embodiment, the connector is not limited to a specific structure. Specifically, the connector 22 includes a seat 221, a first ball valve 222, and a second ball valve 223. The seat 221 is mounted on the oil and gas pipe 11. The seat 221 has a cavity, a first port, and a second port. The cavity is connected to the oil and gas pipe 11, and both the first port and the second port are connected to the cavity. The first ball valve 222 and the second ball valve 223 are both mounted on the seat 221, and the first ball valve 222 and the second ball valve 223 correspond to the first port and the second port, respectively. The first ball valve 222 is connected to the air extraction component 23, and the second ball valve 223 is connected to the pressure measuring component 24.

[0029] It should be noted that the first port and the second port can be closed by the first ball valve 222 and the second ball valve 223 respectively, and the first ball valve 222 and the second ball valve 223 remain in a normally closed state when it is not necessary to detect the regulating valve 12.

[0030] In one embodiment, the seat 221 also has a cover that closes or opens the opening on one side of the cavity, wherein the cover has an external thread and the opening of the cavity has an internal thread. The cover and the seat 221 can be fixedly connected by the external thread and the internal thread engaging. It should be noted that both the first port and the second port are provided on the cover.

[0031] Based on the above scheme, in order to facilitate the disassembly of the air extraction component 23 and the pressure measuring component 24, specifically, the connector 22 further includes a first quick-connect connector and a second quick-connect connector, the first quick-connect connector and the second quick-connect connector being connected to the first ball valve 222 and the second ball valve 223 respectively; the air extraction component 23 is connected to the first quick-connect connector via a first detection tube, and the pressure measuring component 24 is connected to the second quick-connect connector via a second detection tube.

[0032] It should be noted that the first quick-connect fitting and the second quick-connect fitting are not limited to a specific structure. The first quick-connect fitting and the second quick-connect fitting can be a type of 304 stainless steel quick-connect fitting commonly sold on the market, and no further details will be provided here.

[0033] In one embodiment, the oil and gas pipe 11 is provided with two first connecting flanges 11a, and the seat 221 is provided with two second connecting flanges 22a. One second connecting flange 22a on the seat 221 is fixed to one first connecting flange 11a on the oil and gas pipe 11 via a first fastener. The other second connecting flange 22a on the seat 221 is fixed to the flange joint of the control valve 21 via a second fastener. The other first connecting flange 11a on the oil and gas pipe 11 is fixed to the flange joint of the regulating valve 12 via a third fastener.

[0034] It should be noted that the first fastener, the second fastener, and the third fastener are all screws. Of course, in other embodiments, the first fastener, the second fastener, and the third fastener may also be bolts.

[0035] Based on the above scheme, in order to absorb moisture in the gas, it should be noted that a water-absorbing drying element 224 is provided in the cavity. Specifically, the water-absorbing drying element 224 is a desiccant pack, which can be easily replaced by removing the cap.

[0036] In some embodiments, the control valve 21 is a manual valve, the air extraction component 23 is a vacuum pump, and the pressure measuring component 24 is a pressure gauge.

[0037] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An online safety valve testing device, characterized in that, include: A pressure stabilizing mechanism includes an oil and gas pipe and a regulating valve, wherein the regulating valve is connected to the oil and gas pipe; as well as, The testing mechanism includes a control valve, a connector, an air extraction component, and a pressure measuring component. The control valve and the connector are both installed on the oil and gas pipe, and the connector is located between the regulating valve and the control valve. The connector has a first port and a second port that communicate with the oil and gas pipe. The air extraction component is connected to the first port, and the pressure measuring component is connected to the second port.

2. The safety valve online detection device according to claim 1, characterized in that, The connector includes a seat, a first ball valve, and a second ball valve. The seat is mounted on an oil / gas pipe and has a cavity, a first port, and a second port. The cavity is connected to the oil / gas pipe, and both the first port and the second port are connected to the cavity. The first ball valve and the second ball valve are both mounted on the seat and correspond to the first port and the second port, respectively. The first ball valve is connected to the air extraction device, and the second ball valve is connected to the pressure measuring device.

3. The safety valve online detection device according to claim 2, characterized in that, The connector also includes a first quick-connect fitting and a second quick-connect fitting, which are respectively connected to a first ball valve and a second ball valve. The air extraction component is connected to the first quick-connect connector via a first detection tube, and the pressure measuring component is connected to the second quick-connect connector via a second detection tube.

4. The online safety valve testing device according to claim 2, characterized in that, The oil and gas pipe is provided with two first connecting flanges, and the seat is provided with two second connecting flanges. One of the second connecting flanges on the seat is fixed to one of the first connecting flanges on the oil and gas pipe via a first fastener. The other second connecting flange on the seat is fixed to the flange joint of the control valve via a second fastener. The other first connecting flange on the oil and gas pipe is fixed to the flange joint of the regulating valve via a third fastener.

5. The online safety valve testing device according to claim 4, characterized in that, The first fastener, the second fastener, and the third fastener are all screws or bolts.

6. The safety valve online detection device according to claim 2, characterized in that, The cavity is equipped with a water-absorbing and drying component.

7. The online safety valve detection device according to claim 1, characterized in that, The regulating valve is a pressure valve, a vacuum valve, or a PV valve.

8. The online safety valve testing device according to claim 1, characterized in that, The control valve is a manual valve.

9. The online safety valve detection device according to claim 1, characterized in that, The extraction component is a vacuum pump.

10. The online safety valve detection device according to claim 1, characterized in that, The pressure measuring device is a pressure gauge.

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